// ============================================================================
//
// Copyright (C) 2006-2007 Dengues
//
// Google Group: http://groups.google.com/group/dengues
// QQ Group: 24885404
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
//
// ============================================================================
package org.dengues.designer.ui.database.commands;

import org.dengues.designer.ui.editors.AbstractGEFCommand;
import org.dengues.model.database.DBColumn;
import org.dengues.model.database.EMFDataType;

/**
 * Qiang.Zhang.Adolf@gmail.com class global comment. Detailled comment <br/>
 * 
 * $Id: Dengues.epf 2007-12-12 qiang.zhang $
 * 
 */
public class DBGefChangeSelectedCommand extends AbstractGEFCommand {

    private boolean oldValue;

    private final DBColumn newColumn;

    private final boolean selected;

    private final int emfType;

    /**
     * Qiang.Zhang.Adolf@gmail.com DBGefChangeSelectedCommand constructor comment.
     * 
     * @param column
     * @param selected
     * @param emfType
     */
    public DBGefChangeSelectedCommand(DBColumn column, boolean selected, int emfType) {
        if (column == null) {
            throw new IllegalArgumentException();
        }
        this.selected = selected;
        newColumn = column;
        this.emfType = emfType;
        setLabel("change selected");
    }

    /*
     * (non-Javadoc)
     * 
     * @see org.eclipse.gef.commands.Command#execute()
     */
    @Override
    public void execute() {
        switch (emfType) {
        case EMFDataType.DATABASE:
            oldValue = newColumn.isKey();
            newColumn.setKey(selected);
            break;
        case EMFDataType.QUERY:
            oldValue = newColumn.isSelected();
            newColumn.setSelected(selected);
            break;
        }
    }

    /*
     * (non-Javadoc)
     * 
     * @see org.eclipse.gef.commands.Command#undo()
     */
    @Override
    public void undo() {
        switch (emfType) {
        case EMFDataType.DATABASE:
            newColumn.setKey(oldValue);
            break;
        case EMFDataType.QUERY:
            newColumn.setSelected(oldValue);
            break;
        }
    }
}
